If the game you play is just combat or mostly combat with several rests, then Sorcerer is probably better. If it’s 50/50 then Wizard is better. This is due to wizards effectively having a more varied spell selection as Sorcerers have to limit their spells to what they will find effective in combat situations. It’s the utility.
For example, Leomunds Hut is a rare spell for a Sorcerer, but automatic for wizard. Arcane Eye is great for a wizard, almost never a Sorcerer spell. A Sorcerer could take things like that, but if you are you should just go wizard.
Also, nothing a Sorcerer has approaches the diviner ability with Portent. Other wizard abilities are also unique, the Sorcerer abilities modify the spells they already use, making them better.